Malicious PDF — malware analysis report

Static analysis result for SHA-256 35880da6ee6a93d7…

MALICIOUS

PDF

145.6 KB Created: 2020-11-02 00:20:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 97c12620dcc4e6bf5e8ac0f3a2900c50 SHA-1: 3ad4bc952107fe4f3bdd965173c614863ce97a01 SHA-256: 35880da6ee6a93d7be2c013fcff61767a5ae7819ffca9bc0a2560de211ec30bb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically directing users to 'gettraff.ru'. The document body, though heavily obfuscated, contains the same URL and search query, suggesting a phishing or redirection attempt. The presence of numerous external PDF links, many benign but some potentially malicious, indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/123?keyword=inca+elementary+school+principal In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7760187c-6e88-4557-a000-1107e35d6b14/lavuguwad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4553/3876/files/cultural_anthropology_final_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/timafatafej/zewes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3524/8808/files/56147952055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8251/2052/files/palilafisin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/5667/3979/files/garena_rov_mobile_moba_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7425/1671/files/lomupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1561de1-b9af-4e62-9954-25be208f73e8/tools_and_tactics_for_the_master_day_trader_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6794/8706/files/instax_mini_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/120_lessons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8052/2138/files/simplicity_crib_8745h_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7896/6179/files/south_african_books_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1442/1143/files/dewixojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4536/2113/files/madison_mta_sexton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/8238/8901/files/mo_anam_cara_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/the_notorious_jumping_frog_of_calaveras_county.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F49D 5000 bytes
SHA-256: 26a64070ae157de56dc5c3a1d3bdf2447faf397c883e5d22b8f1d4f44e82906b
font_01_sfnt_off0002055d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2055D 11148 bytes
SHA-256: 8c5b061d0a3b6c1f9576587551513e11b216941b26930dec7be0175a0d1fad53
font_02_sfnt_off00022ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22AD0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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